This book is written to serve as a general reference for biologists and resource managers with relatively little statistical training. It focuses on both basic concepts and practical applications to provide professionals with the tools needed to assess monitoring methods that can detect trends in populations. It combines classical finite population sampling designs with population enumeration procedures in a unified approach for obtaining abundance estimates for species of interest. The statistical information is presented in practical, easy-to-understand terminology. — Presented in practical, easy-to-understand terminology- Serves as a general reference for biologists and resource managers- Provides the tools needed to detect trends in populations- Introduces a unified approach for obtaining abundance estimates